| Doubles | |
|---|---|
| 2019 Swiss Open Gstaad | |
| Champions |  Sander Gillé Joran Vliegen |
| Runners-up |  Philipp Oswald  Filip Polášek |
| Final score | 6–4, 6–3 |
Matteo Berrettini and Daniele Bracciali were the defending champions, [1] but chose not to participate this year.
Sander Gillé and Joran Vliegen won the title, defeating Philipp Oswald and Filip Polášek in the final, 6–4, 6–3.
Philipp Oswald / Filip Polášek (Final)
Denys Molchanov / Igor Zelenay (First round)
Guillermo Durán / Andrés Molteni (Semifinals) Sander Gillé / Joran Vliegen (Champions)| First Round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | P Oswald F Polášek | 6 | 7 | ||||||||||||||||||||||||
| WC |  S Ehrat L Margaroli | 4 | 5 | 1 | P Oswald F Polášek | 6 | 6 | ||||||||||||||||||||
 S Bolelli  J Sousa | 6 | 77 | S Bolelli J Sousa | 3 | 2 | ||||||||||||||||||||||
 N Čačić D Lajović | 4 | 64 | 1 | P Oswald F Polášek | 77 | 7 | |||||||||||||||||||||
| 3 | G Durán A Molteni | 4 | 6 | [10] | 3 | G Durán A Molteni | 65 | 5 | |||||||||||||||||||
| P Lorenzi L Sonego | 6 | 3 | [6] | 3 | G Durán A Molteni | 4 | 6 | [10] | |||||||||||||||||||
 R Carballés Baena J Munar | 6 | 6 | R Carballés Baena J Munar | 6 | 2 | [6] | |||||||||||||||||||||
 J Cerretani T Fabbiano | 1 | 4 | 1 | P Oswald F Polášek | 4 | 3 | |||||||||||||||||||||
 C-p Hsieh  C Rungkat | 3 | 4 | 4 | S Gillé J Vliegen | 6 | 6 | |||||||||||||||||||||
| PR |  T Huey  F Nielsen | 6 | 6 | PR | T Huey F Nielsen | 4 | 65 | ||||||||||||||||||||
| P Andújar G Granollers | 6 | 2 | [6] | 4 | S Gillé J Vliegen | 6 | 77 | ||||||||||||||||||||
| 4 | S Gillé J Vliegen | 3 | 6 | [10] | 4 | S Gillé J Vliegen | 6 | 6 | |||||||||||||||||||
 T Daniel  M Jaziri | 0 | 5 | WC | M-A Hüsler J Paul | 4 | 4 | |||||||||||||||||||||
| WC | M-A Hüsler J Paul | 6 | 7 | WC | M-A Hüsler J Paul | 7 | 6 | ||||||||||||||||||||
 J Nedunchezhiyan P Raja | 6 | 6 | J Nedunchezhiyan P Raja | 5 | 4 | ||||||||||||||||||||||
| 2 | D Molchanov I Zelenay | 4 | 2 | ||||||||||||||||||||||||
Joran Vliegen is a Belgian tennis player. Vliegen has a career high ATP doubles ranking of 31 achieved on 10 May 2021. He also has a career high singles ranking of 508 achieved on 1 August 2016. Vliegen won two singles titles on the ITF Men's Circuit, but now focuses on doubles. Vliegen has claimed 5 ATP tour doubles titles with partner Sander Gillé.
Laurynas Grigelis and Zdeněk Kolář were the defending champions but chose not to defend their title.
Sander Arends and Antonio Šančić were the defending champions but chose not to defend their title.
Tim Pütz and Jan-Lennard Struff were the defending champions but chose not to defend their title.
Wesley Koolhof and Artem Sitak were the defending champions but chose not to defend their title.
Elliot Benchetrit and Geoffrey Blancaneaux were the defending champions but only Benchetrit chose to defend his title, partnering Johan Tatlot. Benchetrit and Tatlot withdrew before the tournament began.
The 2019 Swiss Open Gstaad was a men's tennis tournament played on outdoor clay courts. It was the 52nd edition of the Swiss Open, and part of the ATP Tour 250 Series of the 2019 ATP Tour. It took place at the Roy Emerson Arena in Gstaad, Switzerland, from 22 July through 29 July 2019.
The 2019 Generali Open Kitzbühel was a tennis tournament played on outdoor clay courts. It was the 75th edition of the Austrian Open Kitzbühel, and part of the ATP Tour 250 series of the 2019 ATP Tour. It took place at the Tennis stadium Kitzbühel in Kitzbühel, Austria, from July 29 through August 4.
Roman Jebavý and Andrés Molteni were the defending champions, but chose not to participate together. Jebavý played alongside Matwé Middelkoop but lost in the semifinals to Philipp Oswald and Filip Polášek. Molteni partnered Leonardo Mayer but lost in the first round to Oliver Marach and Jürgen Melzer.
Matteo Berrettini and Fabio Fognini were the defending champions, but Fognini chose not to participate this year. Berrettini played alongside Simone Bolelli, but lost in the final to Divij Sharan and Igor Zelenay, 3–6, 6–3, [8–10].
This was the first edition of the tournament.
Sander Gillé and Joran Vliegen won the title, defeating Max Purcell and Luke Saville in the final, 7–5, 6–3. This was the first edition of the tournament, primarily organised due to the cancellation of many tournaments during the 2020 season, because of the ongoing COVID-19 pandemic.
The 2021 ABN AMRO World Tennis Tournament is a men's tennis tournament played on indoor hard courts. It is taking place at the Rotterdam Ahoy arena in the Dutch city of Rotterdam, between 1 and 7 March 2021. It is the 48th edition of the Rotterdam Open, and part of the ATP Tour 500 series on the 2021 ATP Tour. The tournament also included a Men's Wheelchair Tennis Singles and Doubles draw.
Rajeev Ram and Joe Salisbury were the defending champions, but lost to Ivan Dodig and Filip Polášek 6–3, 6–4 in the final.
This was the first edition of the tournament, primarily organised due to the cancellation of some tournaments in 2021, due to the COVID-19 pandemic.
Juan Sebastián Cabal and Robert Farah were the reigning champions from when the tournament was last held in 2019 and successfully defended their title, defeating Kevin Krawietz and Horia Tecău in the final, 6–4, 6–2.
Frederik Nielsen and Tim Pütz were the reigning champions from when the tournament was last held in 2019, but chose to compete in Estoril instead.
Nicolas Mahut and Pierre-Hugues Herbert defeated Alexander Bublik and Andrey Golubev, 4–6, 7–6(7–1), 6–4, to win the Men's Doubles title at the 2021 French Open. This was Mahut's and Herbert's second French Open title and fifth Grand Slam title together. They saved match points in their semifinal match against Juan Sebastián Cabal and Robert Farah. Bublik and Golubev became the first male Kazakh players to reach the final of a Grand Slam.
Raven Klaasen and Michael Venus were the defending champion from when the event was last held in 2019, but they decided not to participate together this year. Klaasen played alongside Ben McLachlan but lost in the second round to Andrés Molteni and Guido Pella. Venus played alongside Tim Pütz but lost in the semifinals to Félix Auger-Aliassime and Hubert Hurkacz.
Nikola Mektić and Mate Pavić won the title, defeating Marcel Granollers and Horacio Zeballos in the final, 6–4, 7–6(7–5), 2–6, 7–5. The Croatians won their 8th title of the year. Mektić won a Grand Slam title in doubles for the first time. Pavić won his third Grand Slam title, having previously won the 2018 Australian Open and 2020 US Open. They are the first Croatian pair to win the Wimbledon doubles title.